Does anyone know what could possibly be wrong with it? If there is something that we can do to fix it that would be best. We have loaded the discs into the player correctly. We can hear the discs moving and changing when we push the buttons in the car but the stereo keeps saying 'disc error'. Any ideas on how to fix this?

make sure its not a burned disc alot of burned discs dont work . another thing could be the lazer is dusty get urself a can of air (computer store like 5 dollars) and spray the inside out but make sure you spray only air you dont want any mist to spray in there. if that doesnt work I would say the lazer is off line and in that case take it in hope this helps